Upgrade from 11.2 to 11.4
I'm planning an upgrade of our LTM HA pair this weekend from 11.2.0 HF2 to 11.4.1 HF2. I have already ran the iHealth and performed a backup of the configuration on both devices along with doing my best to ensure our iRules aren't going to cause a problem after the upgrade. So when I start the upgrade I'm going to install on the backup/secondary device of the pair first, fail-over, and perform any testing. If all is well then I will move on the the primary device in the pair. If it goes horrible bad I will be just failing back and running on the primary device until everything is resolved. Everything that I have read and the fact that the upgrade in still is the 11.x family it all looks straight forward.
I still thought that I would just post here and see if I can get some insight into others experience doing this upgrade. Besides any tips or gotchas things like the time needed for the upgraded would be nice as this will be a 3 AM job on Sunday and getting out of the data center sooner than later would be nice.
Thanks.